Synthesis,Characterization And Visible Light Photocatalytic Activity Of Bi₂MoO₆ Photocatalysts

Photocatalytic material with excellent performance have been used in the shipping field,which have been used to prevent and deal with the pollution that generated during the operation of vehicle,and the application of photocatalysis in this field can greatly improve the utilization rate of light energy.TiO2 the traditional photocatalysis,but the band gap of TiO2 are almost 3.2eV and it absorbs only the ultraviolet light thus more attention had been taken to found heterogeneous semiconductor photocatalysts such as Bi₂MoO₆ which can transform solar energy into chemical energy and decompose organic at a higher efficiency.Bi₂MoO₆ which belongs to Aurivillius oxide family has revealed its preferable visible-light activity,because of its narrower band gap that about 2.48eV.But the high recombination ratios of photogenerated electron-hole pairs have hampered the practical application of Bi₂MoO₆.So many methods to ameliorate its performance had been found.The g-C₃N₄ and Ag/AgBr have been used to improved the photocatalytic activity in this work:1?Ag/AgBr-Bi₂MoO₆ will be prepared by the method of photo reduction.And the sample was characterized by X-ray diffractometer?XRD?,scanning electron microscopy?SEM?,transmission electron microscopy?TEM?,Fourier transform infrared?FT-IR?,UV-vis diffuse reflectance spectroscopy?DRS?and electrochemical experiments to investigate crystalline structure,morphology,composition and properties.The photocatalytic activity of photocatalyst was evaluated by degradation of MB in aqueous solution under visible light irradiation.The power of sample was made into film to improve the utilization ratio of maters.The mechanism of improvement of Bi₂MoO₆ will be discussed by First-principle.2?g-C₃N₄ got a lot of attention because of its excellent performance in photocatalysis.The novel photocatalyst g-C₃N₄/Bi₂MoO₆ was successfully synthesized using ultrasound method.The composites were made into films in this study.Photocatalytic activity was assessed through the decomposition of methylene blue in aqueous solution under visible light irradiation.And the mechanism of the improvement will be discussed in this work.